Nonetheless, it has been also practically proven that graphene can show largely/finely tunable electronic, mechanical, thermal, optical and electromechanical properties, with accurately controlled mechanical straining [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, defect engineering [7]}, [8]}, [9]}, [10]} or chemical doping [11]}, [12]}, [13]}, [14]}, [15]}. We remind that for many centuries, springs have been playing pivotal roles in the design and fabrication of various kind of devices. The importance of springs originates from the fact that, while the mechanical properties of a material is considered as its inherent property and thus invariable, when it is shaped in the form of springs the subsequent structures can show superior stretchability and diverse mechanical responses. In particular, the design of spring like structures have been known as one of the most effective ways to design highly stretchable and flexible moving components.
